CN102315397A - Lithium ion battery post sealing structure - Google Patents
Lithium ion battery post sealing structure Download PDFInfo
- Publication number
- CN102315397A CN102315397A CN201110239377A CN201110239377A CN102315397A CN 102315397 A CN102315397 A CN 102315397A CN 201110239377 A CN201110239377 A CN 201110239377A CN 201110239377 A CN201110239377 A CN 201110239377A CN 102315397 A CN102315397 A CN 102315397A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- post
- battery cover
- battery
- cover board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 60
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 13
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 125000005009 perfluoropropyl group Chemical group FC(C(C(F)(F)F)(F)F)(F)* 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention aims to provide a lithium ion battery post sealing structure which can be applied to high capacity lithium ion battery manufacturing, so that the sealing property of a lithium ion battery can be guaranteed. The lithium ion battery post sealing structure of the invention includes a battery cover plate and a post. The battery cover plate is provided with a post hole, and the key lies in that the lower part of the post is equipped with a plate-shaped sealing platform. The post passes through the post hole of the battery cover plate upwards, and a sealing washer sleeved on the post is positioned between the sealing platform and the battery cover plate. The joint part of the battery cover plate and the post, the sealing platform, and the sealing washer are all covered by an insulating protective sleeve formed by injection moulding. Arranged with multiple seals, the lithium ion battery post sealing structure of the invention has the advantages of simple and stable structure, convenient installation and good sealing property, and can effectively prevent battery air leakage, liquid leakage and external steam intrusion, so that adverse phenomena like electrolyte volatilization and battery performance degradation, etc. can be avoided. Meanwhile with good heat radiation performance, the lithium ion battery post sealing structure provided in the invention improves the battery safety performance.
Description
Technical field
The present invention relates to lithium ion battery and make the field, specially refer to a kind of lithium ion battery pole hermetically-sealed construction.
Background technology
That lithium ion battery has is in light weight, voltage is high, discharge and recharge long, advantage such as self-discharge rate is low, operating temperature range is wide of life-span, has been widely used in fields such as digital camera, mobile phone, electric tool.Along with the development and the maturation of electric vehicle engineering, automobile has become the core technology of electric automobile with the lithium-ion electric pool technology, and becomes the main direction of most of new-energy automobile enterprise.
The battery environment for use of electric automobile is more abominable, and is very high to the security performance requirement of lithium ion battery.In the lithium ion battery that present electric automobile adopts; Cell utilization capacious is few, and the big slightly cell of capacity mainly adopts the method that pole, seal washer, battery cover board are pushed to seal pole, when fastening nut; Rotate pole easily; Cause the sealing of pole and battery cover board bad, under adverse circumstances such as high low temperature, air pressure are low, cause cover plate distortion and battery gas leakage, leakage easily; Have a strong impact on battery performance and cycle life, and present hermetically-sealed construction is not all considered the problem of battery heat radiation.
Summary of the invention
The objective of the invention is to propose a kind of post sealing structure of lithium ion battery, be applied to the manufacturing of high capacity lithium ion battery, to guarantee the sealing property of lithium ion battery.
The post sealing structure of lithium ion battery of the present invention comprises battery cover board, pole; Said battery cover board is provided with the pole hole; Key is that the bottom of said pole is provided with tabular sealing platform; Said pole is upward through the pole hole of battery cover board, is provided with the seal washer that is placed on the pole between said sealing platform and the battery cover board; The side of the joint portion of said battery cover board and pole, sealing platform, seal washer are all covered by the insulation protective jacket that injection moulding forms.
Through the dual-seal of sealing ring and insulation protective jacket, can fully guarantee air-tightness, prevent the intrusion of battery gas leakage, leakage and outside steam.Tabular sealing platform not only is used for fixing pole and sealing ring, also is used for and the lug welding, in time the pole heat is distributed when helping high-rate battery discharge, has improved the security performance of battery.
Further; Periphery is provided with pit to said battery cover board lower surface in the pole hole, and the profile of said pit conforms to the profile of sealing platform bottom, helps sealing the fixing of platform like this; Thereby make pole more firm; And be unlikely to tilt to rock, help insulation protective jacket and battery cover board, pole simultaneously to be combined as a whole better, make structure more firm.
Further, periphery is provided with pit to the battery cover board upper surface in the pole hole, helps insulation protective jacket and battery cover board, pole is combined as a whole better, makes structure more firm.
Further, the end face of the end face of said battery cover board pit, sealing platform is the plane, can guarantee that like this battery cover board well contacts with sealing between the platform, helps the heat radiation of pole.
Further, the position that said pole is positioned at battery cover board top is provided with one or more snap rings, so that stuck mutually fixing between the insulation protective jacket, pole, battery cover board, guarantee that structure is firm.
Further, said seal washer is made up of the cylinder-like structure portion on top and the circulus portion of bottom, and the pole hole of said cylinder-like structure portion and battery cover board is an interference fit, and the diameter of said circulus portion is greater than the diameter in the pole hole of battery cover board.Like this seal washer in the battery cover board bottom surface and battery cover board pole hole carried out dual sealing, improved sealing property.
Further, said seal washer is that silicon rubber is processed, and silicon rubber has better elastic deformation nature and decay resistance, can form good sealing at inside battery, and is affected by environment little, long service life.
Further; Said insulation protective jacket is that PFA is injection molded; PFA is the copolymer of a small amount of perfluoro propyl perfluoroalkyl vinyl ether and polytetrafluoroethylene, can directly adopt the ordinary hot plastic forming method to be processed into goods, and good chemical resistance is arranged; And its electrical insulating property is temperature influence not, can satisfy sealing, insulation function.
The post sealing structure of lithium ion battery of the present invention is multi-sealed through being provided with; Simple in structure firm, easy for installation; Good airproof performance can prevent the intrusion of battery gas leakage, leakage and outside steam effectively, avoids causing degradation bad phenomenon under electrolyte volatilization, the battery performance; Have good performance of heat dissipation simultaneously, improved the security performance of battery.
Description of drawings
Fig. 1 is the structural representation of the post sealing structure of lithium ion battery of the present invention.
Fig. 2 is the structural representation of the battery cover board in the post sealing structure of lithium ion battery of the present invention.
Fig. 3 is the structural representation of the pole in the post sealing structure of lithium ion battery of the present invention.
Fig. 4 is the structural representation of the seal washer in the post sealing structure of lithium ion battery of the present invention.
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are done further to specify.
Embodiment 1:
As shown in the figure; The post sealing structure of the lithium ion battery of present embodiment comprises battery cover board 1, pole 2; Battery cover board 1 is provided with pole hole 2; The bottom of pole 3 is provided with tabular sealing platform 4, and pole 3 is upward through the pole hole 2 of battery cover board 1, is provided with the seal washer 5 that is placed on the pole 3 between sealing platform 4 and the battery cover board 1; Battery cover board 1 is all covered by the insulation protective jacket 6 that injection moulding forms with joint portion, the side of sealing platform 4, the seal washer 5 of pole 2.
2 peripheries are provided with pit 7 to the upper surface of battery cover board 1 in the pole hole; 2 peripheries are provided with pit 8 to the lower surface of battery cover board 1 in the pole hole; The profile of its pits 8 conforms to the profile of sealing platform 4 bottoms; Help sealing the fixing of platform 4 like this and insulation protective jacket 6 and battery cover board 1, pole 3 are combined as a whole better, make structure more firm.
The end face of the end face of battery cover board pit 8, sealing platform 4 is the plane, can guarantee that like this battery cover board 1 well contacts with sealing between the platform 4, helps the heat radiation of pole 3.
The position that pole 3 is positioned at battery cover board 1 top is provided with a snap ring 9, so that stuck mutually fixing between the insulation protective jacket 6, pole 3, battery cover board 1, guarantee that structure is firm.
Seal washer is that 5 silicon rubber are processed, and insulation protective jacket 6 is that PFA is injection molded.
Present embodiment at first is embedded in seal washer 5 upper surface of electrode column sealing platform 4 when mounted, then pole 3 is upward through the pole hole 2 of battery cover board, last injection moulding sealing.
Claims (8)
1. the post sealing structure of a lithium ion battery; Comprise battery cover board, pole; Said battery cover board is provided with the pole hole; The bottom that it is characterized in that said pole is provided with tabular sealing platform, and said pole is upward through the pole hole of battery cover board, is provided with the seal washer that is placed on the pole between said sealing platform and the battery cover board; The side of the joint portion of said battery cover board and pole, sealing platform, seal washer are all covered by the insulation protective jacket that injection moulding forms.
2. the post sealing structure of lithium ion battery according to claim 1 is characterized in that periphery is provided with pit to said battery cover board lower surface in the pole hole, and the profile of said pit conforms to the profile of sealing platform bottom.
3. the post sealing structure of lithium ion battery according to claim 2 is characterized in that the end face of said battery cover board pit, the end face of sealing platform are the plane.
4. according to the post sealing structure of claim 1 or 2 or 3 described lithium ion batteries, it is characterized in that periphery is provided with pit to said battery cover board upper surface in the pole hole.
5. according to the post sealing structure of claim 1 or 2 or 3 described lithium ion batteries, it is characterized in that the position that said pole is positioned at the battery cover board top is provided with one or more snap rings.
6. according to the post sealing structure of claim 1 or 2 or 3 described lithium ion batteries; It is characterized in that said seal washer is made up of the cylinder-like structure portion on top and the circulus portion of bottom; The pole hole of said cylinder-like structure portion and battery cover board is an interference fit, and the diameter of said circulus portion is greater than the diameter in the pole hole of battery cover board.
7. the post sealing structure of lithium ion battery according to claim 6 is characterized in that said seal washer is that silicon rubber is processed.
8. according to the post sealing structure of claim 1 or 2 or 3 described lithium ion batteries, it is characterized in that said insulation protective jacket is that PFA is injection molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110239377A CN102315397A (en) | 2011-08-19 | 2011-08-19 | Lithium ion battery post sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110239377A CN102315397A (en) | 2011-08-19 | 2011-08-19 | Lithium ion battery post sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102315397A true CN102315397A (en) | 2012-01-11 |
Family
ID=45428348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110239377A Pending CN102315397A (en) | 2011-08-19 | 2011-08-19 | Lithium ion battery post sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102315397A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769118A (en) * | 2012-06-18 | 2012-11-07 | 深圳市源科昱科技有限公司 | Combination type pole for power battery |
| CN106374129A (en) * | 2016-11-09 | 2017-02-01 | 大连融科储能技术发展有限公司 | Flow-cell electric-pile sealing structure |
| WO2019056852A1 (en) * | 2017-09-19 | 2019-03-28 | 深圳市瑞德丰精密制造有限公司 | Insulating ring for battery |
| CN113178650A (en) * | 2021-05-07 | 2021-07-27 | 珠海市至力电池有限公司 | Explosion-proof cover plate assembly of lithium ion battery |
| CN115621676A (en) * | 2022-12-19 | 2023-01-17 | 比亚迪股份有限公司 | Compound utmost point post, end plate subassembly, battery and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2773913Y (en) * | 2004-07-22 | 2006-04-19 | 深圳华粤宝电池有限公司 | Battery cover plate assembly and battery therewith |
| CN201270262Y (en) * | 2008-10-08 | 2009-07-08 | 天津力神电池股份有限公司 | Pole column sealing structure for large capacity lithium ionic power cell |
| CN101764200A (en) * | 2010-01-20 | 2010-06-30 | 张力 | Packaging shell body of battery capacitor |
| CN201689923U (en) * | 2009-12-31 | 2010-12-29 | 包雄伟 | Top cover of rechargeable battery packaging shell |
| CN101944576A (en) * | 2010-09-21 | 2011-01-12 | 奇瑞汽车股份有限公司 | Post seal structure for lithium ion battery |
| CN102290544A (en) * | 2011-07-22 | 2011-12-21 | 奇瑞汽车股份有限公司 | High-capacity lithium-ion power battery post sealing structure |
-
2011
- 2011-08-19 CN CN201110239377A patent/CN102315397A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2773913Y (en) * | 2004-07-22 | 2006-04-19 | 深圳华粤宝电池有限公司 | Battery cover plate assembly and battery therewith |
| CN201270262Y (en) * | 2008-10-08 | 2009-07-08 | 天津力神电池股份有限公司 | Pole column sealing structure for large capacity lithium ionic power cell |
| CN201689923U (en) * | 2009-12-31 | 2010-12-29 | 包雄伟 | Top cover of rechargeable battery packaging shell |
| CN101764200A (en) * | 2010-01-20 | 2010-06-30 | 张力 | Packaging shell body of battery capacitor |
| CN101944576A (en) * | 2010-09-21 | 2011-01-12 | 奇瑞汽车股份有限公司 | Post seal structure for lithium ion battery |
| CN102290544A (en) * | 2011-07-22 | 2011-12-21 | 奇瑞汽车股份有限公司 | High-capacity lithium-ion power battery post sealing structure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769118A (en) * | 2012-06-18 | 2012-11-07 | 深圳市源科昱科技有限公司 | Combination type pole for power battery |
| CN102769118B (en) * | 2012-06-18 | 2014-12-10 | 东莞市胜蓝电子有限公司 | Combination type pole for power battery |
| CN106374129A (en) * | 2016-11-09 | 2017-02-01 | 大连融科储能技术发展有限公司 | Flow-cell electric-pile sealing structure |
| CN106374129B (en) * | 2016-11-09 | 2023-11-28 | 大连融科储能技术发展有限公司 | Flow battery pile sealing structure |
| WO2019056852A1 (en) * | 2017-09-19 | 2019-03-28 | 深圳市瑞德丰精密制造有限公司 | Insulating ring for battery |
| CN113178650A (en) * | 2021-05-07 | 2021-07-27 | 珠海市至力电池有限公司 | Explosion-proof cover plate assembly of lithium ion battery |
| CN115621676A (en) * | 2022-12-19 | 2023-01-17 | 比亚迪股份有限公司 | Compound utmost point post, end plate subassembly, battery and vehicle |
| WO2024131017A1 (en) * | 2022-12-19 | 2024-06-27 | 比亚迪股份有限公司 | Composite pole, end plate assembly, and battery |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20120111 |